mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2013.
|
|
|
|
This program is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the Free
|
|
Software Foundation, either version 3 of the License, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
time.cpp
|
|
Measure process running time.
|
|
|
|
*******************************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <errno.h>
|
|
#include <error.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <timespec.h>
|
|
#include <unistd.h>
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
struct timespec start_time;
|
|
clock_gettime(CLOCK_MONOTONIC, &start_time);
|
|
pid_t child_pid = fork();
|
|
if ( child_pid < 0 )
|
|
error(1, errno, "fork");
|
|
if ( !child_pid )
|
|
{
|
|
setpgid(child_pid, child_pid);
|
|
tcsetpgrp(0, child_pid);
|
|
if ( argc <= 1 )
|
|
exit(0);
|
|
execvp(argv[1], argv+1);
|
|
error(127, errno, "%s", argv[1]);
|
|
}
|
|
setpgid(child_pid, child_pid);
|
|
tcsetpgrp(0, child_pid);
|
|
int exit_status = 0;
|
|
waitpid(child_pid, &exit_status, 0);
|
|
tcsetpgrp(0, getpgid(0));
|
|
|
|
struct timespec end_time;
|
|
clock_gettime(CLOCK_MONOTONIC, &end_time);
|
|
struct tmns tmns;
|
|
timens(&tmns);
|
|
struct timespec real_time = timespec_sub(end_time, start_time);
|
|
struct timespec execute_time = timespec_sub(tmns.tmns_cutime, tmns.tmns_utime);
|
|
struct timespec system_time = timespec_sub(tmns.tmns_cstime, tmns.tmns_stime);
|
|
struct timespec user_time = timespec_sub(execute_time, system_time);
|
|
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, "real\t%lim%li.%03li\n", (long) real_time.tv_sec / 60, (long) real_time.tv_sec % 60, real_time.tv_nsec / 1000000L);
|
|
fprintf(stderr, "user\t%lim%li.%03li\n", (long) user_time.tv_sec / 60, (long) user_time.tv_sec % 60, user_time.tv_nsec / 1000000);
|
|
fprintf(stderr, "sys\t%lim%li.%03li\n", (long) system_time.tv_sec / 60, (long) system_time.tv_sec % 60, system_time.tv_nsec / 1000000);
|
|
|
|
return WEXITSTATUS(exit_status);
|
|
}
|